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Iridium-based complexes for water oxidation.

Julianne M Thomsen1, Daria L Huang, Robert H Crabtree

  • 1Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT 06520, USA. robert.crabtree@yale.edu gary.brudvig@yale.edu.

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|May 16, 2015
PubMed
Summary
This summary is machine-generated.

Highly active iridium (Ir) water-oxidation catalysts (WOCs) were developed from organometallic Ir precatalysts. These Cp*Ir catalysts demonstrate versatility, functioning in various modes including homogeneous, heterogeneous, and different activation methods for efficient water splitting.

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Area of Science:

  • Inorganic Chemistry
  • Catalysis
  • Electrochemistry

Background:

  • Organometallic iridium (Ir) precatalysts are effective precursors for homogeneous water-oxidation catalysts (WOCs).
  • The Cp*Ir catalyst series exhibits remarkable versatility in its application and operation.

Purpose of the Study:

  • To describe the development of the Cp*Ir series of water-oxidation catalysts.
  • To explore the diverse operational modes and characterization of these Ir-based WOCs.

Main Methods:

  • Utilizing organometallic Ir precatalysts to generate homogeneous Ir-based WOCs.
  • Investigating catalytic activity under chemical, photochemical, and electrochemical driving forces.
  • Characterizing catalyst activation mechanisms and identifying reaction intermediates.

Main Results:

  • Achieved very high activity in homogeneous Ir-based WOCs.
  • Demonstrated that Cp*Ir catalysts can function as homogeneous or heterogeneous systems.
  • Showcased applicability in solution or supported on solid oxides.
  • Explored various reaction conditions and activation methods.

Conclusions:

  • The Cp*Ir series represents a highly adaptable and active platform for water-oxidation catalysis.
  • Ongoing research focuses on mechanism elucidation and intermediate identification for Ir-based WOCs.
  • These catalysts offer multiple avenues for efficient water splitting applications.